121021101220110 has 128 divisors (see below), whose sum is σ = 373020223887360. Its totient is φ = 24423943205376.

The previous prime is 121021101220073. The next prime is 121021101220111. The reversal of 121021101220110 is 11022101120121.

It is a happy number.

It is a super-2 number, since 2×121021101220110² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121021101220110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021101220111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 963634465 + ... + 963760044.

It is an arithmetic number, because the mean of its divisors is an integer number (2914220499120).

Almost surely, 2^{121021101220110} is an apocalyptic number.

121021101220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021101220110 is an abundant number, since it is smaller than the sum of its proper divisors (251999122667250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121021101220110 is a wasteful number, since it uses less digits than its factorization.

121021101220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927394562.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121021101220110 its reverse (11022101120121), we get a palindrome (132043202340231).

The spelling of 121021101220110 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred ten".